Maryland Department of Transportation State Highway Administration

***TRAFFIC ALERT*** STATE HIGHWAY ADMINISTRATION TO INSPECT THE GOVERNOR THOMAS JOHNSON BRIDGE (MD 4) IN SOUTHERN MARYLAND NEXT WEEK

MD 4 sign

MD 4 sign

​Nighttime Work Begins Sunday Night, November 9 

(November 5, 2025) - The Maryland Department of Transportation State Highway Administration will inspect the MD 4 Bridge over the Patuxent River (Governor Thomas Johnson Bridge) at the Calvert/St. Mary’s County line beginning Sunday November 9.The overnight work will continue through Thursday, November 13, from 9 p.m. until 5 a.m. the following morning, weather permitting.

During the inspection, crews will close one lane and alternate traffic in the open lane using a flagging operation. Portable variable message signs will be placed along area state routes to make travelers aware of the lane closure. The MD 4 bridge inspection will be performed by contractor Hardesty & Hanover of Annapolis. Overnight travelers should plan extra travel time to cross the bridge.

Drivers are asked to stay alert, stay focused, look for reduced speed limits as well as driving pattern changes, and slow down in work zones​.

Drivers in need may dial #77 on their mobile devices for roadside assistance. Customers may contact the District 5 Office at 410-841-1000 or toll-free at 1-800-331-5603 for additional information.

For a list of all major State Highway Administration projects, go to Project Portal, or visit the homepage at roa​ds.maryland.​gov. For a look at real-time traffic conditions, go to chart.mary​land.gov.


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